Recent windstorm damage and question

[Syed Shah]

So due to this recent windstorm in our area, 2-3 shingles are missing from my roof.

Similarly, this corner board has come loose from the siding and needs to be screwed/nailed back and caulked.

Question is, we are expecting some rain later part of this week. Should I get it fixed before it or it can wait a few days and won’t cause any damage?

Thanks for any advice and help